OBD-II code · Powertrain (generic, extended)
P2DDB EVAP System Leak Detection Pump Stuck On
The EVAP leak detection pump stays running when commanded off. Relay welded or driver stuck on. The evaporative system captures fuel vapor from the tank and purges it into intake; leaks or stuck purge valves leak hydrocarbons and cause emissions failures.
Is it safe to drive with P2DDB?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyRelay contacts welded
- PossibleOutput driver stuck on
- Less likelyCarbon or debris buildup preventing free movement
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Evap Leak Detection Pump, Wiring Harness, Ecm
Related codes
- P2DD8Cold Start Fuel Injection Quantity B Higher Than Expected
- P2DD9EVAP System Leak Detection Pump Control Circuit Performance
- P2DDAEVAP System Leak Detection Pump Performance/Stuck Off
- P2DDCFuel Injection Quantity C Lower Than Expected
- P2DDDFuel Injection Quantity C Higher Than Expected
- P2DDEFuel Injection Quantity D Lower Than Expected
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.